Finite Element Simulation of Tensile Tests for α-Iron in the Presence of Hydrogen

Journal of Computational Science and Technology

Lijun LIU³  Agung PREMONO⁴  Hiroshi KANAYAMA²  Reza MIRESMAEILI¹ 

[1] International Research Center for Hydrogen Energy, Kyushu University;Department of Mechanical Engineering, Faculty of Engineering, Kyushu University;Department of Intelligent Machinery and Systems, Graduate School of Engineering, Kyushu University;Department of Mechanical Engineering, Graduate School of Engineering, Kyushu University

关键词: Ductile Fracture;    Hydrogen Embrittlement;    Tensile Tests;    Void;    Multiscale Modeling;   

DOI  :  10.1299/jcst.6.39

学科分类：地球科学(综合)

来源: Japan Academy

【 摘 要 】

References(22)In ductile fracture, the cup and cone fracture that occurs at the neck of a specimen is produced by the coalescence of internal voids which in turn grow by plastic deformation under the influence of a prevailing stress triaxiality. In this work, our concern is with regard to hydrogen embrittlement phenomena, where the presence of hydrogen influences the ductile fracture. We correlate the micro-scale void growth to the macro-scale deformation at the center part of the tensile test model of α-Iron to simulate the hydrogen effects on macro- and micro-scale model simultaneously. The tensile test model is used to determine the hydrogen effects at the macro-scale while the internal void model is used to determine the influence of hydrogen on the void growth. Loads in micro-scale are imported from the displacement results at the center part of the macro-scale tensile model. Our findings show that the proposed approach is feasible and can be implemented to correlate the micro-scale void growth to the macro-scale deformation at the center part of the tensile test model of α-Iron in the presence of hydrogen. Due to limitations of experimental data for hydrogen-material interaction, only α-Iron is considered in this study.

【 授权许可】

Unknown